Flash-light.



J. ANDERSON.

FLASH LIGHT.

APPLICATION FILED FEB. 8, 1909.

Patented Nov. 2, 1909.

J. ANDERSON.

.FLASH LIGHT.

APPLICATION FILED FEB. 8,'1909. A

Patented NW2 1909.

2 SHEETS-SHEET 2.

sTATEsrATENT omucn, f

JOHANNES ANDERSON,A v'on cH'IoAGd-ILLINOIS, AssIGNoR OF ONE-THIRD ToEATON s. PATTERSON AND ONE-THIRD To CHARLES A. SWEET, BOTH OF cHIoAGO,ILLINoIs.-

FLASH-LIGHT.

' Specincation of Letters-Patent.

'Patnted Nov. 2, 1909.

. Apiica't'ionaiea February s, 1909.- sriai No. ganso.

TOaZZ whomfit may cmvcem:v i i Be it known thatl, JOHANNES ANDERSON, acitizen of' the United States, residing at Chicago, in the county ofCook and State of Illinois, have invented new 'and' useful-,Improvements in 'F1ash-Lights,'of whichthe following is aspecification, reference being had to the'drawlngs forming a partthereof.

" operating a Hash-light for' photographic purposes vtected v. degreesof pressure of the pneumatic device for operating them.'

.The purpose' of this invention is'to pro-l vide an improved `device forproducing and in which vthe fulminate sha1 be 'profrom prematureignition, and also in which there shall be provision for connection withthe shutter of the camera to coordinate the action of the shutter withthe flash-light.

It conslsts in the elements and features of 4.construction and theircombinations shown and described as indicated in the claims.

'- Inv the drawings:-Figu`re 1 is :5J-partly sectionalv side elevationof a device embody-I ingl this invention, section being made Ythroughthe operating parts having movement. Fig. 2 is a similar view of 'amodificationadapted for electric 1gn1t1on.

In Fig. 1 of the "drawin s there is represented a shelf or pan, A, orthe'fulminate that is to be ignited for producing the iashlight, ashield,`B, erected at one side of the pan,'A,`a lamp, C,lwhich maybeunderstood to bethe' customary simple alcohol lamp situated lso that itsflame, represented at- C1, may by proper jet be directed toward thefulminate, and being for 4that reason opposite an ignition aperture, 1b,inthe shield, B. D is ai small reservoir foraninlammable liquid, such asgasolene, having ajet'nozzle, D1, projecting toward `the flame,C1,'1n'such direction that a jet from said noz'zle will drive said flame.in the direction of, and yifsuiciently forcible, through, the ignitionwhich the shutter, E,Qmust movev from its Alowest position in order .toregister 'its aperture, b, for igniting 4the fulminate. The primaryfeature ofthe invention conshutter so ais to insure its be` openedvbe'fore thei nition ocurs, and 1n to adapt tie device'to be adjuste forproducing this result when operated'in connection with camera shuttersrequiring varying .the devices being so constructed that the 'can beVdriven back comprise a cylinder, G, mounted `ixedly in 'end of theoyllnder, andhavingtheshutter,

articular' H, is long enoug V 1n; 1, which the .ignition V.etect'ed byatiame projectedby a jet against the fulminate, the invention A'comprlses, 1n combination with the particular elements of the structureabove .de-

scribed, a shutter, E, for closing the ignition aperture, Z), -and meansfor operating such shutter, adapted to be actuated by the saine airimpulse which may be produced from a f bulb, F, for rojecting .thegasolene jet from thenozz e, D, against the flame, C1, first eliect otthe impulsefisto open they'. shutter, the production of the jetfollowing immediately, and the shutter. closing imme-l diately upon thecessation of the impulse, so that'the ignition is. instantly lfollowedby 70 the Vclosing of the shutter before any. flame i throughtheignition aperture.A 1 f The devices for the purpose indicated vrelation to the pan, A, and shield, B, having: aying in it a piston, H,from which. a stem,

1, extends u ward, emerging atl the upper E, secured to itat its upperend. A spring, J, coiled around the stem, H1, within .thecylind'eni'eacting against the piston head, H, holds it normally at thelower end of thecylinder, and yieldingly resists its .up-stroke. "i

The shutter, E, at normal position at whichv it isA held when the istonis at the lower end of the cylinder, c osesthe ignition aper'- ture, b,but has an aperture, E1, which rega isters with said aperture, b, whenthe shutter is thrills/thy the piston to the upper limit of travel ofthe latter. The lower end of the,

cylinder, G, terminates in a connection,-G 15:.

for the tube, K, of the customary oompres-y sion bulb, F, for compressinthe air v`to drive the piston up in the cy inder. Ata.

distance from the lower end of the cylinder,

G, approximately equal to the distance aperture, E1, with .the ignitionlpost,f1oo Z2, the cylinder, G, has a lateral port, g, connectedgby a4tube,-L, with the gasot lene reservoir, D" andthe piston head,

h to cover this port g, when it is at thebottom of the cylinder.` From.thisconstruction it results that the first effect-'of an impulse`produced by the bulb, F, is to'lift the shutter. to the point ofregistration; and instantly upon' that point ies `being; reached, theair pressure operates l11o through the port, g, and duct, L, through thegasolene reservoir to force the gasolene vapor jet. from thev nozzle,D1, against, the flame, C1, driving the latter through l the nowuncovered jet aperture, b. The single air impulse produced by theoperator compressing -the bulb, F, of course gives the piston acontinuous vmovement to the limit to which it can be driven by suchimpulse, or to which it isl permitted-to move bythe construction; andin'this single movement,A at the first stage the shutter is open; at animmediately'suc'ceding and very short stage the gasolene jet-isproduced, and immediv-ately thereafter the limit of movement beingreached, the operator'. having released the bulb immediately upon havingpressed it i v guickly, the piston-fis retracted by the spring,4

andthe shutter-descends, closing the port; andfpressure on thegasolene-reservoir hav-- ving beenonlyinstantaneous, thev jet wasproduced only" long enough to drive thefla'me' .through-the open port,b, against the 'f ulmi-` nate. Into the upper cap, G1, of the cylin- 25vder there is. screwed the tension'sleeye, G2, Whose vlower end' withinthe cylinder bears upon a-cap, J1, -which s'eats the upper end of'sprite J, said tension sleeve 'being deof'r'egulatethe tensionof saidspring' 'screwed down more 'or less through G1. Thisis important inorder that the cap,

the ai'r pressure necessary to operate A the particular camershlitter inconnection with l struction' is shown, theiffulminate ,whichrthefdev-ice is -to be employed. may be reduced jinthebulb,Y l", beforethe piston, I,` can f be forced up '.'fa'r enough` tofunco'ver theI"ort," g,"and.thereby operate the igniter.

`v i e connection, H3 to they bulb-Q F, hasV a side branch, h",forconnection by aftube, M to `the camera Shu vter (o illustrated),

which mayybeljunders'tood' to be equipped withthe customary means for'loperatin it 4byfair f impulse. When thus connecte it' Will'be observedthat the rst portion ofthe ,impulse vfrom'the bulb, F, when compressedbythe operator, will operate through the branch, h3, andz duct, M, 'toopen the camera shutter, fthe ceilingoffthe ignition port, b, 'andfthe'pro uction of the )et and consequentf ignition' of the fulminatefollowing in the order stated, sothat the shutter will be open When-the"produced with-v out'jseparate'attention the, operator. When l,theignition is to be produced by an electric current'the device mayloe-modified as shown in Fig.` 2, so that the ,piston stem, H1,;i nstead'of operating the shutter, consti-` tutes'or carries an electrode inthe igniting circuit, which-is' thrust against; the otherelectrode,'closi'ng'the circult nbyr thegstroke of the piston, which, in'the origina-l; operates the shutter.` .In` Fig.l 2, thirbein'grepresented as Sup or mgthe- 1 postsPP, of acarbon lament, p, acircuitil but f one pole offthe battery cell, S, a Wire, N1,extendingrmmtheptherpble of the-batter to anele'c'trod'eQ R'jan i "Wire,N2, exten ing-from lthe 'other second electrode, T, which is preferably'a spring mounted in.. osition to. be forced against the electrode, v fby:the: up-stroke of thev piston stem, H1.

the stroken the pistori-,j'obvously may be igniting device. T1'1e 'te11s ionsleeve,' G2, per? 4as in that of Fig.' 1, ofvtensionin'g the sprinbulb 'era shutter. 4SLI claimgyflo 1?'1. A-filash-ligh't devicecomprising a ful- "minate support; a shield having an lgnitionaperture;`- av` shutter for controlling. said fand means by which thepiston is heldnorigniterf "eratin'g device, and a branch duct badi eretotrom said cylinder at a point lpressure device by the piston at normalpovcovered-in its shutter-operating stroke. .Y

l Ininate support; a shield havinganignitin aperture; a 'shutter forcontrolling suc aperture.; a shutter-o erating device comcylinder foroplerating the piston, th'econnectien from t e Vair pressure device"tothe mediate the piston vand the air-pressure dean igniter;an-lgnlter-operatlng dev1ce,'an a duct leadin thereto fromthecylinderlat a point in the atter'where vit is cut' effin the ered by thepiston in its operatingstroke.

ort forthefulminate; an igniter for4 prising 'a cylinder an between thepressure device and the Vpiston f the spring,

wire, N, extending from 'one binding post to I.

b tlingpost, P, -tor yaformsl in this co'nstru `2tion'the saine functionmally ,jat shutter`-elding x position; an air,- .j pressure device` foroperating the piston; an

in jthef.atteryvhere'it is cut oil'. from .the airulrninate'; anigniter-oeratingdevice coni-1 A a piston therein; an air pressure devicefor operating the' isf4 ton; a branch leading from the 'air con uitTheparticular lmode 'i of connectin up the circuit be closed-.by

modified. yveryv vWidelyv Without departing fromthe,invention asAapplied to an electric*v accordingjto the camera shutter withlwh'ic 'thedevice isopera'ted to cause Ait to resist the movementfgof the piston.Aand delayjtheI vignitiori'nntil"the pressure produced in the F, isIVsuiiicient' for operatingthe camaperturefa shutter! operatingv deviceconf s1sting .o f. a cylinder-,and a piston thereln,

sition, and' is passed byv the piston and un-4 2. A l'flash-light devicecomprising a fulpf yprising'na cylinder an a piston thereinan`danair-pressure device connected with the 3. A flash-light devicecomprislng a.4 sup` i L cfor connection with a camera shuttera` l springresistmg the movementof the` piston, 1@gandineansforadjusting at willthe tension ess, o45

A 4, A flash-'light device comprising a` support for the fulminate; ashield having an ignition aperture; a shutter for controlling suchaperture; a flame jet device for ignitl ing ythe fulminate through saidaperture; a device for controlling said shutter consisting ofa'fcylinder and a piston thereinand a spring for holding the pistonnormally at .shutter-closing position; an air pressure device foroperating the piston; a .branch duct leading to the ame jet device fromthe cylinder'at a pointin the latter where itis cut off from the airressure device by the piston' at normal posltion and is passed by .ingthe fulminate through said aperture; a

device for controlling said shutter consisting of a cylinder-and apiston therein, and a spring for holding the piston normally atshutter-closing position; an air-pressure device for operating thepiston; a branch duct leading to the flame jet device from the cylinderat a point in the latter lwhere it is cut olf from the airpressuredevice by the piston at normal position and is passed by thepiston and uncovered in itsshutter-operat-l ing stroke, the connectionfrom the air' pressure device to the cylinder having a' branch leading0H between the piston and a camera'shutter', and means thepiston-controlling spring.` In ltestimony whereof, I have hereunto setmy hand, in theflpresence of two witnesses,

'at Chicago, Illinois, this I5th day of Feb- CHAs'. A. SWEET.

lthe .air-pressure device for connection with for tenslonmg

